Open-end wrench



1,626,809 May 3 1927 B. B. GILLETT oPEN END wEENcE Filed Dec. 21, 19'25 ATTORNEY Patented' May 3, 1927;

- lUnire-D STATES;

l BENJAMIN B. GILLETT, F KANSAS CITY, MISSOURI.

OPEN-END Applicationled December l21, 1925. Serial No. 76,694.

My invention relates to open end wrenches .and has for its principal object to provide adevice of this type wherein a' fiat sided nut or bolt head may be received by its angular,

transverse diameter without interference from lthe wrench at its other dimenslon and in a manner to` hold the nut or bolt head more firmly than is 4possible with the ordinary wrench of-this type. l f

In accomplishing this object I have pro` f vided improved details-of structure, tliepreferred'forms of which are illustrated in the accompanying drawings wherein ,Fig. 1 is a detail perspective view of a wrench embodying my improvements.

Fig. '2 is a similar View, illustrating use of the wrench with a square nut.

Fig. 3 is a similar view ofa modified form of wrench adapted for use with-a square though the dou le arrangement is not an' essential of the invention. y

Opening' through the outer end 'o f the head 3 is a socket 4 of a width but slightly greater than that of the particular sized nut or bolt head with which the wrench head is adapted for use, so that such a nut or bolt. head maybe received into the socketand held between the iat sides 5 of the socket 4 with a minimum of lost motion. i i

In the flat sides 5, about midway ofthe depth of the socket are opposite V notches 6 of a depth to receive opposite angles of a nut or'bolt head when the latter is arranged with its angular diameter transverse of,` the socket, the bottom of `the socket being rel cessed to receive an angle of a square nut o r the corresponding facet 'of a hexagonal nut. The recess in the base of the socket preferably constitutes a. V notch 7 similar to the notches 6 in the sides of the socket to receive the angle 8 of a. square nut 9 (Fig 2) the end wall 10 being perpendicular to the sides 5, as clearly shown' in Fig. 2'. 1

A wrench, constructed as described, 1s not only adapted for use in locations where it PATENT OFFICE.

WRENCH. l

BHSSUED would be inconvenient, if not impossible, to

employ awrench. of the ordinary open end type making 90 shifts on square nuts or 60 on hexagonal nuts, butis of increased adyantage even where plenty of turning space is available, because of the' firmer locking grip of the wrench on the nut `or bolt head when the angles of the latter are located in the notchesvin the walls of the wrench.

In the modified form shown in Fig. -3, I providel each side of the wrench socket with two equally spaced notches 6 and the base of the socket with two equally space-d notches 7 for receiving the angles of 'a nut or bolt headso that when a nut or bolt head is located in theisocket, one of its angles 1s located in an outer notch and an opposite angle at one side of the socket in an inner notch at the vopposite side of the socket,

the angular transverse diameter of the nut or bolt head extending diagonally across the perpendicular of the socket. With this arrangement I am able to effect manipulation of'` the nut with a shorter swing of the wrench; i. e., with a reversible wrenehhaving a handle set at anangle of 71/2 to the center line of the throat, the wrench. can be operated with a 15 movement of the handle.

In the same manner the wrench shown in Fig. 4: may .be operated with a 15 movement of the handle. Fig. 2, with the handle set at an angle of lllf to the center line of the throat, the wrench can be operated with a 221/2 movement of the handle.

Itis apparent, therefore, that my im rovement renders the wrench especially a apted for use in locations, such as on bridges, on building steel. work, or in other places where structural steel is used and wherein itis frequently necessary to operate a wrench within a limited range of movement.

What I claim and desire to secure by Letters-Patent is:

. 1. In an open' end wrench, a head comprising a socket having parallel side walls ex tending through the head to the outer edge thereof to form a throat, said walls having op posite.V-shaped notches, and an end wall substantially erpendicular to the walls of said throat, said end wall having a V-shaped notch therein.

In-the form shown in4 2. In an open end wrench, a head comprising-a socket having parallel side walls extendin through the head to the outer edge thereo said walls each having a plurality of s V-shaped notches to receive the angles of a nut or' bolt head, and an end wall substantially perpendicular to the 'walls of said throat, said end Wall having a plurality of notches therein, said V-shaped notches being arranged symmetrically relative to the lonl0 gitudinal. center line of said socket.'

In testimony whereof I aiix my signature.

BENJAMIN B.,GILLETT. 

